The Journal of the Department of Agriculture, Victoria . FIG. 22. lo Aug., 1912.] The Etiology of Contagious Diseases. 499 Next there are a series of diseases which, whilst causing serious havoc,are produced by an organism so small that it cannot be seen except in. FIG. 2J[. cows AFFhCTED WITH FOOT AND MOL TH DISEASE. culture masses. An example is seen in foot and mouth in cattle<^Fig. 24). In 188.^ animals were affected in Great Britain ; in

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectagricul, bookyear1902